Fig. 1 | Nature Communications

Fig. 1

From: Supercluster-coupled crystal growth in metallic glass forming liquids

Fig. 1

Asymmetric growth rates of MG nanorod during isothermal crystallization. a Bright-field TEM image of MG nanorods that are drop-cast on a thin ceramic film for in situ TEM experiments. The scale bar is 1 µm. b Temperature–time sequences used for the isothermal crystallization experiments. The MG nanorods were first rapidly heated to 900 °C for <5 s to remove any residual microstructures that may be left behind from thermoplastic forming. For crystallization from the melt state, the rods were then quenched and held at constant temperature for in situ observations (blue dotted line). For the studies of crystallization from the glass state, the rods were quenched to room temperature, then heated to and held at constant temperature (red dotted line). c, d Snapshot dark field (DF) TEM images of the same nanorod undergoing crystallization from the cooled liquid (c) and from the heated glass (d). The white dotted lines indicate the growth front, determined by the intensity contrast between the crystalline and amorphous regions. Despite using the same crystallization temperature of 420 °C, the growth rate from the heated glass is much higher than that from the cooled liquid. The scale bar is 80 nm